There have been individuals in Government who commanded power to control that Government by force of will, personality or other means.
In a representative Democracy this does not often occur.
However, we have seen the polarization of Politics to the extent that one party votes as a single block.
In this situation the majority party effectively can act as a single entity - as a PoliticalTyrant.
When both houses of Congress are controlled by a single party and the members of that party vote as a single block, there will be a PoliticalTyrant over the Legislative branch.
When the Executive branch is of the same party and mindset to vote in lock-step with its party you have a stronger PoliticalTyrant.
When the Judicial branch is of the same party and mindset to rule in lock-step with its party you have a juggernaut PoliticalTyrant at the head of Government.
Election Fraud along with the TechTyrant and the MediaTyrant have successfully effected a PoliticalTyrant.
Even those who have previously opposed them are now afraid to because of the power that this triumverate wields.